【摘要】 本试验选用溴氰菊酯和杀灭菊酯,以柴油和水作稀释剂,用家用手动喷雾器在树干胸高处喷药环防治越冬上下树松毛虫取得了较好的防治效果。持效期可维持40天以上。这是一种局部、微量施药方法,施药时间在秋末或春初,多数有益生物已经停止或尚未开始活动,所以,对森林中许多有益昆虫的影响很小。更多还原

【Abstract】 Deltainethrin and fenvalerate are diluted in diesel oil or water in the tests. A house sprayer is filled in with the solution, then a pesticide ring is sprayed on the chest-high tree-trunk of pine trees to kill pine caterpillars climbing the trees up or down in the early spring or late autumn, and a good effect is achieved.The effect can be kept for a period of 40 days. The effect of method on the beneficial insects is slight, because this is a topical and trace-spraying method and many varieties of the beneficial insects have not yet begun or have stopped their activities when the method is used.更多还原